The Combination of Anaerobic Digestion and Electro-Oxidation for Efficient COD Removal in Beverage Wastewater: Investigation of Electrolytic Cells

The world’s ever-growing population is driving an increased demand for clean water, which makes treating and reusing wastewater essential practice. In recent years, biological physicochemical methods have been preferred treatment, with combined systems proving particularly effective. this study, the combination of anaerobic digestion (AD) electro-oxidation (EO) was investigated as a process removing chemical oxygen (COD) from actual beverage wastewater. effect hydraulic retention time (HRT) on AD, electrolysis time, sodium chloride (NaCl) dosage, initial pH, electro-properties EO investigated. At optimum conditions, namely HRT 2 days NaCl concentration 3 g L−1, 80 min natural pH (7.45), applied voltage 20 V EO, removal efficiency COD impressive 96.47%, energy consumption specific calculating 177.33 kWh m−3 33.79 kgCOD−1, respectively. amount by-product gases (CH4 H2) were also meagerly determined in study. results confirm that combining AD effective solution can benefit industry, while offering sustainable to combat water scarcity meet growing water.